Today I finished with the second. Afterburner works just fine when the unofficial overclockingmode is NOT enabled. And with this I mean the text in the .cfg gile. So normal overclockin works fine. When I add the:

EnableUnofficialOverclocking = 1UnofficialOverclockingEULA = I confirm that I am aware of unofficial overclocking limitations and fully understand that MSI will not provide me any support on itUnofficialOverclockingMode = 2AccessibilityCheckingPeriod = 0

I am using Trixx as afterburner refused to work correctly for me. It was saying something about an error when booting. I was having the same issue and two things that I figured out are:

1. Your video out has to come from the graphics card. I was trying to use onboard graphics from my 2500k, but it refused to show the settings for the cards in Catalyst and Trixx.

2. I couldn't get Trixx to show any information before I started Catalyst. I also had to change some of the settings. I have check marks on: Show effective memory clocks, set clocks on change, save fan settings with profile, and disable ULPS.

Overclocking with MSI afterburner is really just a request sent to the GPU and the GPU says yes or no. I had this same problem and ended up going to a beta version of afterburner. Later i switched to CGMINER. Try unsettling sync video cards. and see if just one shows the correct OC. Also what does GPU-Z say the clocks are?

I tried unsync, doesn't work. I have tried everything that you are going to suggest GPU-Z shows the right information. 850/1200 without any changes and the same clocks that AB shows when I OC. This is really weird.

Today I finished with the second. Afterburner works just fine when the unofficial overclockingmode is NOT enabled. And with this I mean the text in the .cfg gile. So normal overclockin works fine. When I add the:

EnableUnofficialOverclocking = 1UnofficialOverclockingEULA = I confirm that I am aware of unofficial overclocking limitations and fully understand that MSI will not provide me any support on itUnofficialOverclockingMode = 2AccessibilityCheckingPeriod = 0

you probably already tried this but have you tired one GPU and not two? One of my boxes ended up failing when i tried to OC it b/c of a faulty GPU. AB would send a request before i tried to changing anything in AB, just when i launched AB and that GPU said "Nope" and dropped all the sliders to 0 even when gpuz shows accurate measurements.

I use CGMiner and I can only get the memory on my 6870s right now to 800. I think that it is simply a settings issue somewhere though.

I read somewhere that 6xxxs cards can only go 500mhz or something like that below the core clock. might be wrong but i cannot go much past 500 below my core with my 6950s

Core is at 900. I'd like to turn the memory down as they're running a little warmer than I'd like inside the case. I had to add an extra fan on one core of my 6870x2 to keep it from throttling at 85*. I tried turning it down in Trixx, but it won't save.